a range of a document beyond its size, caused libcurl to "hang" until the
server closed the connection and then it returned error 18.

This is bad. This way, we don't return any error at all, which isn't nice
either, as we need to alert the app somehow that the request range was out
of size.

we might not get a body when we get a 401 with a set of WWW-Authenticate:
headers. This fixes the problem Kevin Roth detected in 7.10.8-pre4 and pre5.
Verified by test case 91.

authentication negotiations needed for NTLM, Digest etc.

out if necessary

work.

build libcurl to use ares for asynch name resolves.

need it.

Bailiff's bug report 768275.

   CURLOPT_SSL_CTX_FUNCTION to set a callback that gets called with the
   OpenSSL's ssl_ctx pointer passed in and allow a callback to act on it. If
   anything but CURLE_OK is returned, that will also be returned by libcurl
   all the way back. If this function changes the CURLOPT_URL, libcurl will
   detect this and instead go use the new URL.

   CURLOPT_SSL_CTX_DATA is a pointer you set to get passed to the callback set
   with CURLOPT_SSL_CTX_FUNCTION.

Added code to deal with white spaces in relocation headers.

a "plain" Negotiate as well.

as otherwise we can re-send requests on the same connection nicely

but the infrastructure is there.

added.

libcurl will stop reading when the number of bytes have arrived and not wait
for a closed socket.

returned

 set to "".  This frees the application from having to know which encodings
 the library supports.